Meego use an overlay vkb and does not resize the browser.

This patch adds a new element for VKB handling to the browser. A preference decide if you use a overlay or a resize based VKB. The Calculation is based on that. The patch has some areas to fix up. We need still to transfer informations about the size of the vkb, if the hardware keyboard is visible and which keyboard is visible. What this patch does: - changing the calculation - fixed height for characters to guaranty that the user can read what he is typing - scroll and zoom back to caret in case user scrolled / zoomed away and start typing again. - adjustment of scroll and zoom in case of rotation - following the caret to keep it visible - adds a spacer to cover cases when the input field is on the bottom of a page - adds a workaround for a text render issue (text not painted on second page - tilemanager problem) - position and zooming correctly for non textinput fields and ensure that they are visible. - moves the formhelper correctly This is still WIP, it does not cover yet: - UI cases - In case the Hardware Keyboard is visible you see the spacer - Static height of the spacer (worst case height)

Meego related issue. will revisit triage in the future

This bug got split up, there is right now no Meego Part about it.